2016 Saanich inlet symposium Physical processes in Saanich ...
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AN INITIATIVE OF DEEP SEA SCIENCE. February 11, 2016 Richard Dewey ONC Associate Director, Science 2016 Saanich inlet symposium Physical processes in Saanich inlet
Transcript of 2016 Saanich inlet symposium Physical processes in Saanich ...
AN INITIATIVE OF
DEEP SEA SCIENCE.
February 11, 2016
Richard DeweyONC Associate Director, Science
2016 Saanich inlet symposiumPhysical processes in Saanich inlet
WHAT THE OCEAN IS TELLING US ABOUT CLIMATE CHANGE | APRIL 23, 2013DEEP SEA SCIENCE.
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Saanich inlet- Protected fjord, wind events N or S- Sill Depth 75m, Maximum Depth 230m- 24 km long, width 1-5 km- No significant estuary circulation, more likely a
reverse estuary with fresh surface waters in main basin coming from outside (Winter RF/CR, Summer FR/SoG)
- Tidal currents at sill ~½ knot or less, weakening immediately in the Inlet
- Currents in main basin tend to be cyclonic (anti-clockwise), peak currents 5-10 cm/s
- Vertical mixing is weak, some internal wave/tide, more lateral stirring.
- Density intrusions, including deep water renewal governed by salinity sources (S) and mixing outside, with in-flow “finding” the appropriate density surface or bottom.
WHAT THE OCEAN IS TELLING US ABOUT CLIMATE CHANGE | APRIL 23, 2013DEEP SEA SCIENCE.
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BuoyProfiler System(BPS)
~210m isobath
WHAT THE OCEAN IS TELLING US ABOUT CLIMATE CHANGE | APRIL 23, 2013DEEP SEA SCIENCE.
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Spring Tide (stronger mixing)Neap (weaker mixing)
Neap Tide (weakest mixing)
Salinity StratifiedSources: Fresh (Rivers) and/or Salt (Upwelling)
WHAT THE OCEAN IS TELLING US ABOUT CLIMATE CHANGE | APRIL 23, 2013DEEP SEA SCIENCE.
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